Something strange (to me) and I'm not sure this is correct or not. Take the attached NEF (old one one found on the net, just 3Mb, but I have the same result with a NEF from my D800) Convert it to TIF (using dt, 16bpp). Open both images and add +1.0EV to both. The exposure applied to the TIFF is far more pronounced than the one on the NEF.

History

Maybe, but when I open both images they are with the same exposure and images looks really alike. So I suppose that changing exposure to both at the same level should give the same output. But I doubt that exposure is done before basecurve anyway.

vs standard linear for the exported image (also module is off per default)

When the NEF base curve is applied to the exported image, the effect is even more pronounced. Also, applying the NEF base curve to the exported image without exposure module already gives a different result.